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Method for deeply purifying minim phosphor in water with composite resin

A composite resin, deep purification technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of low treatment depth and poor specificity, and achieve the effect of large treatment capacity

Active Publication Date: 2009-01-14
JIANGSU NJU ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for deep purification of trace phosphorus in water by composite resin, aiming at the problems of poor specificity and low treatment depth in traditional water purification technology for trace phosphorus - 、HCO 3 - , SO 4 2- When the molar concentration of the phosphate ion is much higher than that of the phosphate ion, most of the phosphorus in the effluent can be removed by the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put 50ml (about 40 grams) of composite resin HFO-D201, which uses macroporous strongly basic anion exchange resin D-201 as the matrix and supports 10% nanometer hydrated iron oxide (calculated as Fe) on the surface, into a glass adsorption In the column (Φ32×360mm), at 25±5°C, the concentration of the filtered water containing trace phosphorus (P(V) is 1ppm, Cl - At a concentration of 100ppm, HCO 3 - The concentration is 100ppm, SO 4 2- The concentration is 150ppm) and the pH value is adjusted to 7, and the flow rate of 15BV / h passes through the resin bed layer, the processing capacity is 4000BV, and the effluent PO 4 3- The concentration dropped below 20ppb.

[0020] When the adsorption reaches the leakage point (PO 4 3- When the concentration is greater than 20ppb), the adsorption is stopped, and 300ml of NaOH and NaCl mixed solutions with a concentration of 2% by weight are used to desorb through the resin bed at a flow rate of 50ml / h at a temperature of 30±5°...

Embodiment 2

[0022] The adsorption device is the same as in Example 1, but the adsorption temperature is controlled at 5±2° C., and the adsorption effect and treatment capacity are basically unchanged.

Embodiment 3

[0024] The adsorption device is the same as in Example 1, but the adsorption temperature is controlled at 40±5° C., and the adsorption effect and treatment capacity are basically unchanged.

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PUM

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Abstract

The invention discloses a method for deeply purifying micro-phosphorus in water by composite resin. The pH value of water is firstly adjusted to between 5.0 and 9.0 for filtration, then the filtrate passes through an absorption tower filled with composite resin materials to make the micro-phosphorus in water be adsorbed on the composite resin; and the adsorption stops when the adsorption reaches the leakage point, a mixed solution of NaOH and NaCl serves as a desorption agent for desorption and regeneration, then a CO2 saturated solution is used to leach the absorption tower filled with composite resin materials for regenerating resin. The method takes composite resin of surface supported nano-hydrous ferric oxide or hydrous manganese oxide particles as an adsorbent to deeply purify micro-phosphorus in water. After the treatment by the method, the phosphate content (as P) in effluent can still be reduced to below 20ppb from 0.05-20ppm when the molar concentration of coexistent competing ions of Cl<->, HCO3<-> and SO4<2-> is far higher than that of phosphate ions. The method has large treatment capacity, and the materials are renewable and recyclable.

Description

technical field [0001] The invention relates to a method for deep purification of trace phosphorus in water, in particular, a method for deep purification of trace phosphorus in water by using a composite resin material with high adsorption capacity and selectivity for phosphorus. Background technique [0002] The discharge of phosphorus and other nutrients into water bodies may lead to serious eutrophication, and the deep purification of trace phosphorus in water bodies is of great significance for water quality security. Correspondingly, countries around the world are constantly developing new tertiary treatment processes to meet more stringent phosphorus emission control standards. These processes usually use physicochemical or biochemical methods to achieve the purpose of phosphorus removal. Generally, the operation cost is high, and it is easy to generate sludge and cause secondary pollution, and often cannot treat the phosphorus content of the effluent to a low level. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/58
CPCC02F2101/105C02F1/288C02F2303/16
Inventor 潘丙才潘丙军张庆建邱慧张炜铭苏庆陈新庆张全兴
Owner JIANGSU NJU ENVIRONMENTAL TECH
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